I am convinced all of these things are unsafe. I refuse to take calls when driving over bluetooth; distracting yourself with a conversation when you're supposed to be driving is reckless and I think this is doubly true when it's a phone conversation (in which the other participant can't watch the road and know when to stop talking.)

Even music while driving is a nuisance. Nobody talks about the role of music in car accidents because almost everybody likes it, but it contributes to distracted driving and in some cases reckless driving. It encourages people to continue driving when they are mentally fatigued (take note of how many people say music "helps" them during long drives.)

GPS navigation on a screen is a bad idea too; your eyes cannot read a screen and watch the road at the same time. Pure voice navigation giving brief commands and updates is sufficient and relatively safe. Car integration isn't necessary at all; a phone placed in the center console with the volume turned up and the screen turned off gets the job done. If you need to make adjustments or read a text or take a call, pull over.